diff --git a/lib/symbols b/lib/symbols
index 25d01b03e3..88f81f47ab 100644
--- a/lib/symbols
+++ b/lib/symbols
@@ -82,6 +82,7 @@ bmatrix           matrix      none
 matrix            matrix      none
 pmatrix           matrix      none
 psmatrix          matrix      none
+smallmatrix       matrix      none
 vmatrix           matrix      none
 CD                matrix      none